Merge pull request #859 from webauthn4j/dependabot/gradle/springBootVersion-2.6.6

Bump springBootVersion from 2.6.5 to 2.6.6

Author: ynojima

build.gradle

@@ -17,7 +17,7 @@
 buildscript {
     ext{
         //Plugins
-        springBootVersion = '2.6.5'
+        springBootVersion = '2.6.6'
         sonarqubeVersion = '3.3'
         asciidoctorGradleVersion = '1.6.1'
         artifactoryVersion = '4.28.1'